1 files changed, 93 insertions, 0 deletions
diff --git a/include/configs/colibri_t20_sdboot.h b/include/configs/colibri_t20_sdboot.h
new file mode 100644
index 0000000000..a23d1a6823
--- /dev/null
+++ b/include/configs/colibri_t20_sdboot.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2012 Toradex, Inc.
+ * Portions Copyright (c) 2010, 2011 NVIDIA Corporation
+ * Portions Copyright (c) 2011 The Chromium OS Authors
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Use this configuration for an u-boot which stores its environment in SD/MMC
+ * Useful if SD/MMC is selected as the boot device, so also the environment is taken from there
+ *
+ * Use colibri_t20.h for everything which is not specific to using SD/MMC as the boot device!!
+ */
+
+/*
+SD-BOOT
+The sd sector numbers are used as follows:
+u-boot needs to find ENV and LNX to get to the environment and the kernel, the kernel needs to find the APP partition for the rootfs.
+ENV: colibri_t20_sdboot.h
+Set CONFIG_ENV_MMC_OFFSET to the byte start address of ENV, take the sector address of Partid 6 (which is in 2024 byte sectors)
+
+LNX: colibri_t20.h
+Set the u-boot environment SDBOOTCMD below, mmc read RAMloadaddr, 512byte sector start, 512byte copy length
+take the sector address of Partid 7 (which is in 2024 byte sectors)
+
+APP: colibri_t20.h
+Set the u-boot environment sdargs and the variable GPT_PRIMARY_PARTITION_TABLE_LBA below.
+The kernel finds the partition with the help of the GP1/GPT partitions. The kernel commandline must include "gpt gpt_sector=xxx"
+to force it to use GUID Partition Table (GPT) and to give the 512byte sector start address of the primary GUID.
+Set this in
+Take the start address of Partid 8 (which is in 2048 byte sectors). add 1 to the resulting 512byte block. (at pos. 0 is the MBR)
+
+E.g. Output during nvflash procedure on serial console:
+SD Alloc Partid=2, start sector=0,num=1536
+SD Alloc Partid=3, start sector=1536,num=64
+SD Alloc Partid=4, start sector=1600,num=960
+SD Alloc Partid=5, start sector=2560,num=64
+SD Alloc Partid=6, start sector=2624,num=64
+SD Alloc Partid=7, start sector=2688,num=2048
+SD Alloc Partid=8, start sector=4736,num=512
+SD Alloc Partid=9, start sector=5248,num=500032
+SD Alloc Partid=10, start sector=505280,num=460352
+
+sector start address 4736 * 2048 -> 18944 * 512 -> GPT start sector is 18945.
+*/
+
+
+#ifndef __CONFIG_SDBOOT_H
+#define __CONFIG_SDBOOT_H
+
+#include "colibri_t20.h"
+
+#undef DEFAULT_BOOTCOMMAND
+#undef CONFIG_BOOTCOMMAND
+
+#define DEFAULT_BOOTCOMMAND \
+	"run sdboot; run nfsboot"
+#define CONFIG_BOOTCOMMAND	DEFAULT_BOOTCOMMAND
+
+
+#ifdef CONFIG_ENV_IS_NOWHERE
+#undef CONFIG_ENV_IS_NOWHERE
+#endif
+#ifdef CONFIG_ENV_IS_IN_NAND
+#undef CONFIG_ENV_IS_IN_NAND
+#endif
+
+/* Environment stored in SD/MMC */
+#define CONFIG_ENV_IS_IN_MMC 1
+
+#if defined(CONFIG_ENV_IS_IN_MMC)
+#define CONFIG_SYS_MMC_ENV_DEV 0 /* use MMC0, slot on eval board and Iris */
+#define CONFIG_ENV_MMC_OFFSET  (10496 * 512) /* Byteaddress of the beginning of the ENV partition */
+#endif
+
+#endif /* __CONFIG_H */